Chameleon-PIC Nurve Networks, Chameleon-PIC Datasheet - Page 42

• Manufacturer Part Number: Chameleon-PIC
• Description: MCU, MPU & DSP Development Tools PIC24 & PROPELLER DEV SYSTEM (SBC)
• Manufacturer: Nurve Networks

Specifications of Chameleon-PIC

• Processor To Be Evaluated: PIC24
• Data Bus Width: 16 bit
• Interface Type: USB, VGA, PS/2, I2C, ISP, SPI
• Operating Supply Voltage: 3.3 V, 5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10.3 VGA Signal Primer
The VGA standard is much easier to understand that the NTSC standard is, in fact, using a visual explanation (Figure
10.3) is usually all people need to see, but still there are some gotcha’s so we are going to discuss them as well in the
brief primer. To start, the actual important signals you need to generate for VGA are (referring to Table 10.3 are) Red,
Green, and Blue video as well as Hsync and Vsync. The R,G,B signals are analog voltages representing the
instantaneous intensity of any particular channel and range from 0-1.0V, the Hsync and Vsync are simply TTL signals,
usually active LOW (but these can be inverted on most monitors) where a logic LOW is sync, and a logic HIGH is no sync.
Now, let’s look more closely at the signal itself.
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Table 10.3 - VGA female header pin out (HD15)
Function
RED Video
GREEN Video
BLUE Video
RESERVED
-GROUND
-RED Ground
-GREEN Ground
-BLUE Ground
NC
-GROUND
ID0 (Ground)
ID1 (NC)
VSYNC
HSYNC
NC
Color Code (most manufactures)
© 2009 NURVE NETWORKS LLC “Exploring the Chameleon PIC 16-Bit”
BLACK
BLACK/WHITE
BROWN
BROWN/WHITE
RED+SHIELD
ORANGE
MINT GREEN
NC
GREEN
BLUE
PURPLE
GREY
WHITE
SHRIMP
YELLOW
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